Get rid of node transformers.
Be smart about captions.
Mergeit.
Removed generic node implementations.

They are now back at home.
Next iteration on trying to generalize Nodes.
Next iteration on view nesting/delegation.
Hack-attack to achieve the first editable image caption.
Editable list items.
Deactivatable last char hack.
Merge remote-tracking branch 'upstream/0.1.x' into modularize

Conflicts:
	nodes/codeblock/codeblock.js
	nodes/node/node_view.js
	nodes/paragraph/paragraph.js
	nodes/text/text.js
	nodes/text/text_view.js
Merge branch 'modularize' of https://github.com/elifesciences/lens-article into modularize